Alert archive / Maryland / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 128, NWS Baltimore/Washington

June 15, 2000Arlington County, Virginia; Montgomery County, Prince George's County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 15, 2000, 7:34 PM EDT for Arlington County, Virginia; Montgomery County, Prince George's County, Maryland. It was in force for 41 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 15, 2000, 7:34 PM EDT (23:34 UTC)
Expired: Jun 15, 2000, 8:15 PM EDT
In force: 41 min
Issued by: NWS Baltimore/Washington
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Montgomery County, MD, Prince George's County, MD, Arlington County, VA

The radar

The Sterling radar (KLWX), 38 km from the middle of the area, began a volume at 23:35 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jun 15, 7:40 PM EDT	Hail 1	Germantown, MD	Quarter sized hail fell.
Jun 15, 7:50 PM EDT	Hail 0.75	Silver Spg, MD	Dime sized hail fell.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 15, 2:15 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.6 hours before the alert went out and 30 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 59 J/kg
Mixed-layer CIN: -184 J/kg
Mixed-layer LCL: 598 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 15, 2:35 PM EDT, 4 hours 59 minutes earlier.

Area forecast discussion, Jun 15, 2:35 PM EDT, 4 hours 59 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
235 PM EDT THU JUN 15 2000

REAL BUSY...AND RUNNING LATE

INSTAB AXIS TO CROSS AREA TAFTN/EVE...COVERED BY WATCHES AS APPRO.
WUD XPCT FG TO RDVLP TNGT IN SOUPY AMS. DONT SEE GOOD TRIGGER
TMRW/TMRW NGT...AND WL KEEP POPS OUT. S/WV/CDFNT APPRCHG AREA SAT WL
SPARK NXT CHC.  TEMP FCST WL SMWHT RFLCT PERSISTENCE...90ISH BY
DAY/ARND 70 BY NGT.

WL DO BEST TO GET ZFP OUT BY 4PM.

.LWX...
DC...SVR TSTM WATCH TIL 8PM.
MD...SVR TSTM WATCH TIL 6PM MDZ002 AND TIL 8PM 003>007-009-011-013-014.
VA...SVR TSTM WATCH TIL 7PM VAZ021-025-026-036-037 AND TIL 8PM NRN
SHEN VLY/DC METRO.
WV...SVR TSTM WATCH TIL 6PM WVZ048>050-054-055 AND TIL 8PM 051-053.

HTS

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 15, 2:16 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	44 min
Jun 15, 4:44 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Loudoun	46 min
Jun 15, 5:12 PM EDT	Severe Thunderstorm Warning	LWX	Loudoun	48 min
Jun 15, 5:31 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, City of Winchester	44 min
Jun 15, 5:31 PM EDT	Severe Thunderstorm Warning	LWX	Shenandoah	44 min
Jun 15, 6:19 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Fauquier, Loudoun	41 min
Jun 15, 6:19 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, City of Winchester	41 min
Jun 15, 6:19 PM EDT	Severe Thunderstorm Warning	LWX	Warren	41 min
Jun 15, 6:42 PM EDT	Tornado Warning	LWX	Clarke, Fauquier, Loudoun	33 min
Jun 15, 7:10 PM EDT	Severe Thunderstorm Warning	LWX	Fairfax, Loudoun, City of Fairfax, City of Falls Church	50 min
Jun 15, 7:22 PM EDT	Tornado Warning	LWX	Loudoun	23 min
Jun 15, 7:22 PM EDT	Tornado Warning	LWX	Fairfax, City of Falls Church	23 min
Jun 15, 7:22 PM EDT	Tornado Warning	LWX	City of Fairfax	23 min
Jun 15, 7:34 PM EDT	Severe Thunderstorm Warning	LWX	City of Alexandria	41 min
Jun 15, 4:29 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	46 min
Jun 15, 6:12 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	33 min
Jun 15, 6:17 PM EDT	Severe Thunderstorm Warning	LWX	Jefferson	43 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2000 Severe Thunderstorm Warnings in Virginia, 2000 Every severe thunderstorm warning in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.